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[" 4.A load of "4kg" is suspended from a...

[" 4.A load of "4kg" is suspended from a ceiling through a steel wire of length "],[20m" and radius "2mm" .It is found that the length of the wire increases "],[" by "0.031mm" as equilibrium is achieved.If "g=3.1times pi ms^(-2)" ,the value of "],[" young's modulus in "Nm^(-2)" is "],[[" 1) "2.0times10^(12)," 2) "4.0times10^(11)," 3) "2.0times10^(11)," 4) "0.02times10^(9)]]

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